Xfinity turned YouTube pre-rolls into data price tags

Mobile carriers sell data in abstract gigabytes, so customers rarely connect a plan to a single video. Xfinity Mobile, Comcast's new wireless service, had a concrete pitch: use WiFi hotspots and stop paying cellular data charges — but explaining that in a banner was forgettable.

Goodby Silverstein & Partners instead made the cost concrete. The 'Data in Dollars' campaign computed what each upcoming YouTube video would consume on a smartphone connection and rendered it as a six-second pre-roll price tag: a makeup tutorial cost up to $1.57 in data, a basketball highlight its own amount. The ads matched the genre of the video they preceded.

The mechanic turned a media buy into a product demo. Every video watched through the pre-roll became a working example of the problem Xfinity Mobile solved, in dollars and cents the viewer was about to spend. The pitch was self-demonstrating: see the price, then switch.

The work was shortlisted at D&AD 2019 in the media category, and the idea — turning an ad slot into a live calculation of the viewer's own cost — became a reference point for data-pricing communication.

Price the video, not the plan

The price tag makes an abstract cost tangible before the viewer spends it

Matching ads to video genres makes every slot feel personalized

The pitch demonstrates the fix — free WiFi — at the moment of pain

Viewers share the gag, turning paid slots into earned media

Put the cost where the customer can feel it: instead of explaining a data plan, show the exact price of the next action they are about to take, and the competitor's pain becomes your pitch.

Data in Dollars was shortlisted at D&AD 2019 and widely covered as one of the cleverest uses of the pre-roll format. It showed that the ad slot itself can be the message: a live calculation of the viewer's own cost, rather than a separate sell inside the interruption.